{"uid":"cap_weR1JW_4XxafHrIhMS-Mb","slug":"delta-witness-web-capture-proof-service-4433f855","name":"DELTA Witness — Web Capture & Proof Service","description":"Paid, machine-verifiable capture and preflight checks for public web sources.","url":"https://delta-witness-api.ruphussten.workers.dev/v1/capture","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","pattern":"^https?://","description":"Public HTTP(S) webpage to observe."}}},"responseSchema":{"type":"json","example":{"ok":true,"product":"capture","proof_id":"7d9d12f7-8f91-5f41-9f0c-5ef257d9ea5d","bundle_root":"sha256:0000000000000000000000000000000000000000000000000000000000000000","observed_at":"2026-08-31T00:00:00.000Z","manifest_url":"https://delta-witness-api.ruphussten.workers.dev/v1/proofs/7d9d12f7-8f91-5f41-9f0c-5ef257d9ea5d","public_proof_url":"https://delta-witness-api.ruphussten.workers.dev/p/7d9d12f7-8f91-5f41-9f0c-5ef257d9ea5d"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_JnZ-IIwEvJcRyxCW8tSdb","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Captures a public webpage and returns a machine-verifiable cryptographic proof bundle with a tamper-evident hash and timestamped manifest.","exampleAgentPrompt":"Capture and create a cryptographic proof of what https://example.com/pricing currently shows, so I have a verifiable timestamped record I can reference later.","exampleUseCases":[{"title":"Pre-action evidence capture for AI agents","prompt":"Before my agent acts on the data at https://api.competitor.com/public-rates, capture a verifiable proof of what that page says right now so I have an auditable record tied to the decision."},{"title":"Dispute-ready webpage snapshot","prompt":"Archive https://shop.example.com/product/42 with a cryptographic proof right now — I need to be able to prove exactly what the price and description said today in case there's a dispute later."},{"title":"Compliance record for regulatory audit","prompt":"Take a witnessed, tamper-evident snapshot of https://disclosure.acmecorp.com/q3-filing so our compliance team has a machine-verifiable record of what was published at this moment."}],"resultDescription":"A JSON object containing: a boolean success flag, product type ('capture'), a unique proof_id UUID, a SHA-256 bundle_root hash of the captured content, an observed_at ISO timestamp, a manifest_url pointing to the full proof manifest, and a public_proof_url for human-readable verification.","failureModes":["URL is not publicly accessible or returns a non-2xx status — capture fails with an error","URL does not match the required https?:// pattern — rejected at input validation","Payment (x402) not provided or insufficient — 402 Payment Required response","Target page requires JavaScript rendering that the capture service cannot execute — partial or empty capture","Rate limiting or upstream timeout on the target URL — capture may time out or return incomplete data"],"whenToPreferThis":"Choose this endpoint when you need a cryptographic, timestamped proof that a specific public URL contained particular content at a specific moment — especially for autonomous agent workflows where decisions must be auditable, for compliance use cases requiring tamper-evident records, or for dispute resolution where a screenshot is insufficient and machine-verifiability matters. Prefer this over simple HTTP fetching or screenshot tools when the downstream requirement is a verifiable hash/manifest rather than raw HTML.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:39:56.593Z","isFirstParty":false}